نتایج جستجو برای: blast effect
تعداد نتایج: 1661472 فیلتر نتایج به سال:
Blast traumatic brain injury (bTBI) affects civilians, soldiers, and veterans worldwide and presents significant health concerns. The mechanisms of neurodegeneration following bTBI remain elusive and current therapies are largely ineffective. It is important to better characterize blast-evoked cellular changes and underlying mechanisms in order to develop more effective therapies. In the presen...
In this paper, we propose and analyze an Adaptive Modulation System with optimal Turbo Coded V-BLAST (Vertical-Bell-lab Layered Space-Time) technique that adopts the extrinsic information from MAP (Maximum A Posteriori) Decoder with Iterative Decoding as a priori probability in two decoding procedures of V-BLAST scheme; the ordering and the slicing. Also, we consider and compare The Adaptive Mo...
BACKGROUND Blast-related traumatic brain injury (TBI) has been a significant cause of injury in the military operations of Iraq and Afghanistan, affecting as many as 10-20% of returning veterans. However, how blast waves affect the brain is poorly understood. To understand their effects, we analyzed the brains of rats exposed to single or multiple (three) 74.5 kPa blast exposures, conditions th...
The most luminous GRBs can be explained in terms of models involving stellar mass central engines only if the ejecta are beamed. As was pointed out by Rhoads (1997), the dynamics of the blast wave, formed by the beamed ejecta sweeping the external gas, can be significantly modified by the sideways expansion. This is because in this case the surface of the blast wave increases faster than just d...
Traumatic brain injuries (TBI) are frequently caused by blasts which trigger a series of neuronal biochemical changes, often resulting in reduced brain/nervous system function and/or cell death. These blasts are characterized by two phases, an initial positive pressure phase closely followed by a negative pressure phase. Other possible blast aftereffects include stretching or shearing of the ce...
Lung injuries, predominantly arising from blast exposure, are a clinical problem in a significant minority of current military casualties. This special feature consists of a series of articles on lung injury. This first article examines the mechanism of the response to blast lung (primary blast injury to the lung). Subsequent articles examine the incidence of blast lung, clinical consequences a...
Dose-dependent effects of a tumor promotor on blast cell progenitors in human myeloblastic leukemia.
AML blast cell progenitors form colonies in culture when stimulated by a media conditioned by leukocytes in th presence of PHA. Two cellular processes occur during colony formation: self renewal generates new progenitors, while others undergo a change that leads to decreased proliferative potential. We tested the effect of the potent tumor promotor, 12-0-tetradecanoyl phorbol acetate (TPA) on t...
Patients who have recently experienced highintensity blasts are more likely to perform abnormally on tests developed to be sensitive to deficits of central auditory processing than were ageand hearing-matched individuals without blast exposures. Here, a group of 59 participants was recruited, 30 of whom were exposed to high-intensity blasts between 4 and 11 yr prior to testing and did not parti...
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